How do you solve a problem like this with derivatives? I can't find anything in the book about it and no matter how I look at it, the problem just seems to be physics.

A silver dollar is dropped from the top of a building that is 1321 feet tall. Use the position function below for free-falling objects. _ _ 2 s{t} 161' + v0? + so {a} Determine the position and velocity functions for the coin. s{f} = S (b) Determine the average velocity on the interval [3, 4]. S We {1:} Find the instantaneous velocities when t = 3 seconds and t = 4 seconds. w = E ms 4: = E m (d) Find the time required for the coin to reach the ground level. [Round your answer to three decimal places} {e} Find the velocity,r of the coin at impact. {Round your answer to three decimal places.) : m